Mold on pentadecathlon is a period60oscillator composed of a mold and a pentadecathlon. Although it is composed of two oscillators of smaller periods (4 and 15 respectively), it is considered non-trivial, because it has a single cell that is alive in generation 5 and is dead in the other 59 phases of the oscillator. In terms of its 24cells it is the smallest known period 60 oscillator.

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Generation 5 reveals the single cell that oscillates at the full period (in green).